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Maintenance Carburetor; Kawasaki Clean Air System (on Us Model) - Kawasaki KZ400 Service Manual

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Table of Contents
286 SUPPLEMENT FOR 1980 MODEL
Maintenance
CARBURETOR
Refer to Pgs. 156- 162, noting the following:
1. Table N6 shows the carburetor specifications for KZQOQJ and KZ550.
2. Jet needle on US model carburetor has only one groove in which the clip is set.
Table N6
Carburetor Specifications
I
KZ550 (US)
I
K22P-2C
1
#92
1
4D92
1
#32
1
-
1
2.5
1
29.5
*
1
1
3.5
*
1
1
@
:
West German model
Pilot Screw
I % * %
@
1
K
+
'/n
Model
KZ400
KZ550 (other
than US)
KAWASAKI CLEAN AIR SYSTEM
(on US Model)
The motorcycle on US model adopts the air injection
system for the clean air system.
The secondary air injection system helps the fuellair
mixture burn more completely. Following the power
stroke, the exhaust valve opens.
As the burned fuel
charge passes the exhaust valve, it i s still hot enough
t o burn i f air is supplied.
By introducing a stream of
fresh air into the hot exhaust gases just as they pass
Jet Needle
4C91-2
the exhaust valve, the burning i s both intensified and
prolonged. This increased burning action tends to burn
up a great deal o f the normally unburned gases, as well
as changing a significant portion of the positions carbon
monoxide into harmless carbon dioxide.
The secondary air injection system consists o f a
vacuum switch valve, air suction valves, and air hoses.
Without the use o f an air pump, this system introduces
fresh air into the exhaust system near the exhaust ports
in response to pressure differentials generated by pulses
in the exhaust.
Throttle Valve
Cutaway
2.5
Pilot Jet
r32
Type
K21 P-2A
@ K ~ I P - 2 ~
K22P-2D
@
K21 P-2A
Kawasaki Clean Air System (US model)
Main Jet
$9 0
@ # 9 2
1. Air Cleaner Housing
3. Air Hose
5. Air Hose
7.
Exhaust Valve
2. Air Cleaner Element
4. Vacuum Switch Valve
6. Air Suction Valve
8.
Vacuum Hose
Fuel Level (mm)
#92
@
#90
Design
29.5
*
1
Service
3.5
*
1
4D93-2
@
4 ~ 9 1 - 2
"32
1
3 / 8
@ I % * %
2.5
29.5
+
1
3.5
*
1

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